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Date:      Fri, 9 Dec 2016 23:58:21 +0100
From:      Hans Petter Selasky <hps@selasky.org>
To:        kargl@uw.edu, freebsd-current@freebsd.org, freebsd-hackers@freebsd.org
Subject:   Re: System hangs at boot in xhci0
Message-ID:  <5a509678-2a67-b538-ea42-d9e80a6bd3eb@selasky.org>
In-Reply-To: <20161209210940.GA1144@troutmask.apl.washington.edu>
References:  <20161209210940.GA1144@troutmask.apl.washington.edu>

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On 12/09/16 22:09, Steve Kargl wrote:
> I updated my system to
>
> % svn info /usr/src
> Path: /usr/src
> Working Copy Root Path: /usr/src
> URL: svn://svn.freebsd.org/base/head
> Relative URL: ^/head
> Repository Root: svn://svn.freebsd.org/base
> Repository UUID: ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f
> Revision: 309748
>
> Built a shiny new kernel, which hangs during boot.
> There is no panic.  Using the dmesg from kernel.old/kernel,
> the last few reported are
>
>
> pci2: <ACPI PCI bus> on pcib2
> xhci0: <XHCI (generic) USB 3.0 controller> mem 0xfe900000-0xfe900fff irq 48 at device 0.0 on pci2
> xhci0: 32 bytes context size, 64-bit DMA
>
> At this point, the system is completely unresponse and
> needs to be power cycled.
>

Hi,

What is the next message in the old kernel which is printed? There has 
been zero changes in the XHCI driver recently.

Can you copy /boot/kernel.old to /boot/kernel.works

Then add this option to the GENERIC kernel config:

options VERBOSE_SYSINIT

What are the last few messages in dmesg when you boot with the above flag?

--HPS



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